Not an Issue... a feature.

[ub0nFPS]

Display prefix and postfix on player names above head. (that way my ranks work)

[Talark-Systems]

Don't we already have this?

[Weissnix4711]

Would be great to be able to toggle this.

You could change the entire name, but that might interfere with other commands. Ie. The game thinks the rank is part of the player's username.

Or you could use a scoreboard for now, and set display to below name.